JSLint：构造函数中意外悬挂。 为什么？

Question

I have a constructor function:

function Constructor(parameter) {
    this._property = parameter;
}

and later

Constructor.prototype.someFunction = function() {...}

JSLint is complaining

Unexpected dangling '_' in '_property'

But when I read the explanation to this warning I find this :

ESLint only raises this warning for variable and function identifiers and not for object property identifiers. jslinterrors.com

I thought this._property would be an object property... so I would expect that JSLint should be happy with that. What am I doing wrong here?

Answer 1

js doesn't have notion of"private" & identifiers prefixed with the underscore character are often used to indicate a private variable but here it does not provide any privacy

If you're using JSLint , you can fix the error by setting the nomen (nomenclature) option to true .

/*jslint nomen: true */
function Constructor(parameter) {
    this._property = parameter;
}

Answer 2

You can see for yourself by logging your Constructor that this isn't added to the front of methods/variables:

JSBIN of the code below

function Constructor(parameter) {
  this._property = parameter;
  this.property = parameter;
}

var x = new Constructor(5);
console.log(x); 
// logs: 
{
  _property: 5, // dangling error
  property: 5
}

You can follow directions to turn off notification of the error HERE

or not use an underscore.